Randy Jackson calls the Executors of Michael Jackson's Estate 'criminals'

Randy Jackson just came out swinging against the people in charge of the Michael Jackson Estate -- claiming the executors are "criminals" who falsified documents for their own personal gain ... but it's looking like Randy's plot is quickly crashing and burning.

Randy Jackson just spoke with Al Sharpton on MSNBC's "Politics Nation" ... and tried to explain why he and his siblings are trying to overthrow John Branca and John McClain. 

"We feel there is criminal misconduct," Jackson said, claiming the Executors had a hand in faking Michael Jackson's will, and Randy believes he can prove it because Michael was in NY on the day he supposedly signed the document in L.A.  

Problem is ... Randy's argument has a GIANT flaw ... the "mistake" he's pointing to is based on a witness who merely forgot what city he was in at the time the will was signed. 

There are witnesses who saw Michael Jackson sign the will and it has been validated by the court.

But even if Randy and his siblings were to get the will invalidated, Michael Jackson's old will cuts them out of Michael Jackson's fortune too and it appoints Branca Executor.

Multiple sources tell TMZ ... the situation is simply a money grab by Micahel Jackson's siblings who know that once Katherine Jackson dies, Michael Jackson's money goes in trusts for his kids. Randy and co. will never get a dime.

Randy kept saying they are a family.  Paris begs to differ, because she just tweeted, "'Family' they said."  Can you feel the sarcasm? And apparently Randy hasn't read TMZ ... that Tito has already jumped the "family" ship.